<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>验证diff算法</title>
</head>
<body>
<!-- 准备好一个“容器” -->
<div id="test"></div>

<!-- 引入react核心库 -->
<script type="text/javascript" src="../js/17.0.1/react.development.js"></script>
<!-- 引入react-dom，用于支持react操作DOM -->
<script type="text/javascript" src="../js/17.0.1/react-dom.development.js"></script>
<!-- 引入babel，用于将jsx转为js -->
<script type="text/javascript" src="../js/17.0.1/babel.min.js"></script>

<script type="text/babel">
  class Time extends React.Component {
    state = {date: new Date()}

    componentDidMount() {
      setInterval(() => {
        this.setState({
          date: new Date()
        })
      }, 1000)
    }

    render() {
      return (
          <div>
            <h1>hello</h1>
            <input type="text"/>
            <span>
              现在是：{this.state.date.toTimeString()}
              <input type="text"/>
            </span>
          </div>
      )
    }
  }

  ReactDOM.render(<Time/>, document.getElementById('test'))
</script>
</body>
</html>
